scholarly journals Numerical research of resistance of environment to accelerated motion of bodies with various forms in channel of constant section

2021 ◽  
Author(s):  
I. G. Rusyak ◽  
V. A. Tenenev ◽  
S. A. Korolev
Keyword(s):  
Accelerated Motion ◽  
Numerical Research ◽  
Constant Section

Calculation And Experimental Substantiation Of Optimal Design Of The Welded Joint Of Plates On Соver Plates

2020 ◽  
pp. 17-24
Keyword(s):  
Welded Joint ◽  
Experimental Studies ◽  
Engineering Calculation ◽  
Tensile Tests ◽  
Physical Nonlinearity ◽  
Steel Plates ◽  
Optimal Parameters ◽  
Actual Problem ◽  
Numerical Research ◽  
Cover Plates

The article is devoted to the actual problem of assigning optimal parameters for connecting steel plates on cover plates with angular welds that are widely used in construction practice. The article presents the results of a comprehensive study of operation of a welded assembly of the plates connection on cover plates. An algorithm is proposed for determining the optimal parameters of a welded joint with fillet welds on the cover plates, which makes it possible to obtain a strength balanced connection. The results of full-scale tensile tests of models were presented. These results confirmed the correctness of the assumed design assumptions, and made it possible to obtain a form of destruction, not characteristic and not described in the normative literature, expressed by cutting the main elements along the length of the overlap in the joint. The possibility of such a form of destruction was confirmed by the results of numerical research in a nonlinear formulation. The optimal parameters of the nodal welded joint determined by engineering calculation are confirmed by experimental studies, as well as by the results of numerical experiments on models of calculation schemes, taking into account the physical nonlinearity of the material operation. The obtained dependence for determining the bearing capacity of the joint by the cut-off mechanism and the expression for limiting the overlap length of the cover plates will make it possible to predict the nature of the fracture and design equally strong joints.

On the motion of bodies based on changes in the kinetic moment

2019 ◽  
Vol 20 (4) ◽  
pp. 267-275
Author(s):  
Yury N. Razoumny ◽  
Sergei A. Kupreev
Keyword(s):  
Center Of Mass ◽  
Stellar Dynamics ◽  
Elementary Particles ◽  
The Body ◽  
Accelerated Motion ◽  
Indirect Confirmation ◽  
Physical Principles ◽  
Two Bodies ◽  
Central Gravitational Field ◽  
Kinetic Moment

The controlled motion of a body in a central gravitational field without mass flow is considered. The possibility of moving the body in the radial direction from the center of attraction due to changes in the kinetic moment relative to the center of mass of the body is shown. A scheme for moving the body using a system of flywheels located in the same plane in near-circular orbits with different heights is proposed. The use of the spin of elementary particles is considered as flywheels. It is proved that using the spin of elementary particles with a Compton wavelength exceeding the distance to the attracting center is energetically more profitable than using the momentum of these particles to move the body. The calculation of motion using hypothetical particles (gravitons) is presented. A hypothesis has been put forward about the radiation of bodies during accelerated motion, which finds indirect confirmation in stellar dynamics and in an experiment with the fall of two bodies in a vacuum. The results can be used in experiments to search for elementary particles with low energy, explain cosmic phenomena and to develop transport objects on new physical principles.

scholarly journals Experimental and numerical research on influence of winglets arrangement on vortex pump performance

2021 ◽  
Vol 1741 ◽  
pp. 012019
Author(s):  
A Machalski ◽  
J Skrzypacz ◽  
P Szulc ◽  
D Błoński
Keyword(s):  
Pump Performance ◽  
Vortex Pump ◽  
Numerical Research

scholarly journals Experimental and numerical research on a novel underwater launching method with high efficiency and low resistance

AIP Advances ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 025212
Author(s):  
Xinwei Zhang ◽  
Yonggang Yu
Keyword(s):  
High Efficiency ◽  
Low Resistance ◽  
Numerical Research

scholarly journals Numerical research of thermal stress in a gas burner with a cylindrical mantle in relation to its construction

2020 ◽  
Vol 1426 ◽  
pp. 012022
Author(s):  
B Prochaska ◽  
N Radić ◽  
P Gvero
Keyword(s):  
Thermal Stress ◽  
Numerical Research ◽  
Gas Burner
Sign in / Sign up

Export Citation Format

Share Document